<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button id="connect">连接</button>
    <button id="send" disabled="true">发送数据</button> <br><br>
    从服务器接受的数据如下：<br> 
    <span id="content"></span>
    <script>
        var connect = document.querySelector('#connect');
        var send = document.querySelector('#send');
        var content = document.querySelector('#content');
        var ws = null;

        connect.onclick = function() {
            ws = new WebSocket('ws://localhost:9998')
            ws.onopen = () => {
                console.log('连接服务器成功');
                send.disabled = false;
            }

            ws.onmessage = msg => {
                console.log('从服务器接受到了数据')
                console.log(msg)
                content.innerHTML = msg.data;
            }

            ws.onclose = function() {
                console.log('服务器关闭了连接')
                send.disabled = true;
            }
        }

        send.onclick = function(){
            ws.send(JSON.stringify({
                action: 'themeChange',
                socketType: 'themeChange',
                chartName: '',
                value: 'chalk'
            }))
        }
    </script>
</body>
</html>